The tracking tests are suspect because some of the issues could be with minimum focusing distance and lens particularities. Letting that go (because there are no STM-compatible lenses for BOTH systems) both the cameras exhibited issues, yet you seem more critical of the Sony. Why?

I agree what Canon has done is amazing. It really is and I am not a fan of their cameras. However, your conclusions show a really weird bias. In particular I watched that low-light test four times *trying* to see what you were seeing. Are you SURE you didn't confuse the two?!

EDIT: ditto on the focus breathing comment. BOTH cameras had an issue with focus breathing. Both. Again, why the bias? Yes, the article is about the Canon. That's why I read it. But why bring it up when they both clearly do it? Plus it is an aspect of the LENS not the camera/focus mechanism.